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. 2021 Apr 12;12:640061. doi: 10.3389/fphys.2021.640061

FIGURE 2.

FIGURE 2

Signaling mechanisms regulating TFEB nuclear translocation in normal (A) and stressed conditions (B). (A) TFEB binds GTP- RagGTPase on the surface of lysosome followed by the recruitment of Raptor and mTOR. This complex allows the phosphorylation of TFEB, which interacts with 14-3-3 adaptor with subsequent degradation. (B) In stressed conditions, calcium ions released from lysosomes through mucolipin 1 channel activates the protein phosphatase calcineurin, (CN) which dephosphorylates TFEB, allowing its nuclear translocation.